AS568-142 Buna-N 70 Duro Black O-Ring for 2-3/8 ID X 3/32 CS

Buna-N O-Rings 70 Duro Black BN700100-142

$ 0.2607 per Each

Minimum Order Quantity (MOQ): 116

Ships within 7 days

Qty	Price
116 - 134	$0.2607
135 - 287	$0.1955
288 - 575	$0.1564
576 - 1150	$0.1173
1151 - 2301	$0.0912
2302+	$0.0782

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Product Details

Material	Buna-N
Temperature Range	-40°F to 250°F
Cross Sectional Shape	Round
Hardness	70
Dash	142
Fractional	ID: 2-3/8 CS: 3/32 OD: 2-9/16
Actual (Inch)	ID: 2.362 ± 0.020 CS: 0.103 ± 0.003 OD: 2.568
Actual (Metric)	ID: 59.99 ± 0.51 CS: 2.62 ± 0.08 OD: 65.230

Buna-N (Nitrile) O-rings are made from a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. They are among the most widely used sealing materials due to their excellent resistance to oils, fuels, and many chemicals. Nitrile O-rings provide high mechanical strength, outstanding wear resistance, and good tensile strength, making them ideal for automotive, industrial, and aerospace applications.

Buna-N Recommended Uses

Seals and gaskets, fuel systems, hydraulic systems, oil and gas industry, automotive applications, general-purpose applications.

Buna-N Not Recommended

Brake fluid, ozone, UV exposure, phosphate esters, chlorinated hydrocarbons, aromatic hydrocarbons, ketones, strong acids, atmospheric aging.

Buna-N Limitations

Not suitable for ozone, sunlight, or weathering exposure.
Limited performance in high-temperature environmen.
Not ideal for strong acids and alkalis.
Not recommended for applications requiring low compression set.

Buna-N Usable Temperature Range

-30 to 250°F (-34 to 121°C)

Buna-N Also Known As

Buna-N, Nitrile, NBR, Nitrile Butadiene Rubber.